Loop warp tension-variable beat-up apparatus for terry looms



Jan. 20, 1953 T. c. SIPPEL 2,625,956

LOOP WARP TENSION-VARIABLE BEAT-UP APPARATUS FOR TERRY LOOMS Filed Sept. 25, 1950 4 Sheets-Sheet l F 10 36 2 37 IO 4o as 60 I 64 r I g 4! Z 22 INVENTORZ Tl/[ODORE C SIPPEL.

ATT( )RNEYS.

Jan. 20, 1953 c, SI'PPEL 2,625,956

LOOP WARP TENSION-VARIABLE BEAT-UP APPARATUS FOR TERRY LOOMS Filed Sept. 25, 1950' 4 Sheets-Sheet 2 [a S E 54r- PT 4 J7 o o 52 u 75 (,1 1 ea 4% ATTORNEYS.

T. C. SIPPEL Jan. 20, 1953 LOOP WARP TENSION-VARIABLE BEAT-UP APPARATUS FOR TERRY LOOMS 4 Sheets-Sheet 3 Filed Sept. 25, 1950 THEODORE C. SIPPEL,

INVENTOR.

ATTORNEYS.

Jan. 20, 1953 T. c.. SIPPEL LOOP WARP TENSION-VARIABLE BEAT-UPEAPPARATUS FOR TERRY LOOMS Filed Sept. 25, 1950 4 Sheets$heet 4 HIT 15 M4 M1 No 1/7 105 o 24 n3 0 125 1/5 H 112' F 1/4 I25 123 m6 no m7 7115000125 C. SIPPEL,

INVENTOR.

BY i w ATTORNEYS.

Patented Jan. 20, 1953 if-UNITED STATES PATENT 'oFFlcs- LOOP WARP TENSION-VARIABLE BEAT-UP,

APPARATUS FOR TERRY LOOMS Theodore CrSippel, Rock Hill, S. C., assign or to Edinburgh Corporation, Laurinburg, N. 0., a corporation of North Carolina Application September 25, 1950, Serial N 0. 186,531

3 Claims. (01. 13926) This invention relates to looms forweaving 1 looped fabrics, such as terry fabrics and the like, and more especially to an improved pattern controlled variable beat-up mechanism wherein the position of the reed is varied upon predetermined beat-up strokes of the lay and also includes pattern controlled means fo effecting afmomentary slackening of the tension in the loop warp yarns, the pattern means serving to cause a. coacting relationship between the periods in which a variation of the beat-up of the reed and a variation in the tension in the loop warp yarns is effected.

It is an object of this invention to provide an apparatus of the type described which is comprised of a minimum of parts and requires only minor changes in the loom structure and wherein the variable beat-up mechanism and the means for slackening the tension in the loop warp yarns may be controlled from a common pattern mechanism such as a dobby head or a jacquard mechanism.

,It is still another object of this invention to provide an improved pattern controlled means for stopping the reed in the course of a beat-up stroke of the lay at predetermined intervals in advance of the lay reaching the limit of its movement toward the normal fell of the cloth, the reed being pivotally mounted upon the lay to permit the lay to continue its movement after the reed. has been stopped. The improved meansfor stopping the reed in advance of the lay approaching the normal limit of its, forward movement includes crank means pivotally mounted intermediate the upper and lower ends of the swords which support the lay and having arms extending at substantially right angles to each other, one of the arms having the front end of a forwardly and rearwardly movable traverse bar connected thereto provided with a notch therein and the other or others'of the arms each having a connecting rod pivotally connected to the free end thereof. The other end of each connecting rod is connected, by means of a toggle leverage, to the lower edge of a reed which is pivoted with the reed capv so the lower edge thereof may move relative to the sword.

A latch is pivoted adjacent the traverse bar and is connected to a pattern mechanism which will cause the latch to engage the notch in the armspivoted on the swords to, inturn, cause the loweredge of the reed to swing rearwardly relative to the lay so that the reed will stop short of a normal beat-up stroke thereof although the lay may continue through to the limit of its forward stroke. t

It is still another object of this invention .to provide patterncontrolled means which coact with the shortening of the beat-.up stroke of the reed for causing van additional length of loop warp yarn to be fed to .the reed or, in other words, to slackenlthertension in the loop warp yarns momentarily .during each'normal heat-up stroke immediately following the relatively short beat-upstroke or strokes of the reed so as to permit the slackenedloop warp yarns to be sub.- sequently taken up by thev reed during normal beat-upstrokes therefrom to form loops thereof. This pattern controlled means for slackening or feeding the loop warp yarns includes a feed roll, preferably an abrasive roll, tightly around which the loop warp yarns pass in their course to the reed and which is geared to a ratchet wheel past which a pawl isreciprocated by mechanical connections with the driven parts of the loom, there being a connection between the pattern mechanism and the pawl for periodically. moving the pawl into engagement with the ratchet wheel at predetermined intervals to thus impart move-:- ment to the ratchet wheeland the loop warp feed roll to 'slacken the warp yarns carried thereby momentarily. Some of the objects of, the invention havin been stated, other objects will appear as the description-proceeds when taken in connection with the accompanying drawings in which- Figure 1 is a schematic longitudinal vertical sectional view through'a loom for weaving looped fabrics, with many of the parts being shown schematically and showing the improved variable beat-up and loop warp feed apparatus in association therewith; v

Figure '2 is an enlarged elevation looking substantially along the line'2--2 in Figure l-and showing a medial portion of the m and includln details of theimproved variable beat-up apparatus; Y

' Figure 3 is an enlarged fragmentary'elevation of the left-hand portion of Figure 1 showing the lay and associated parts in a diiferent position;

Figure 4 is a fragmentary elevation of the upper left-hand portion of Figure'3 showing the reed in a forward position;

Figure 5 is an enlarged perspective elevation looking at the opposite side of the upper right? hand portion o f liigure l and illustrating, the

improved pattern controlled means for feeding the loop warp yarns;

Figure 6 is a fragmentary elevation looking at the right-hand side of Figure 5, omitting all but the central portion of Figure 5.

Referring more specifically to the drawings,

the nunieral20 indicates the horizontally spaced side frames of a terry loom, only one of which is shown in Figure 1. These loom side frames 20 are held in spaced relation to each other by a breast beam 2|, a front lower girt 2-2, a rear lower girt 23 and an arch 24 all of which are suitably secured in the usual manner to the loom side frame members 20. Supported in -a conventional manner on the loom side frame members 20 and being provided with the usual warp tension means associated therewith, not shown, is a basic warp beam 25 disposed above which is a loop or terry warp beam 26.

- The basic warp beam 25 has :base warp. yarns W-l extending upwardly and forwardly therefrom which pass over a suitable roll 21., which may be termed a whip roll. These, base warp yarns W-l extend forwardly from above the whip roll 21 and pass through a pair of relatively vertically movable harnesses 30 (Figures 1 and 3) to which movement is imparted from a driven crank shaft-3| rotatably mounted on the loom side frame members 20 and through, intervening conventional connections, notshown, but which are well known to those familiar with the art.

The base warp yarns W-'| pass forwardly from the harnesses 30 and through a pivoted or swingable reed 34 the upper edge of which is fixedly mounted in a conventional pivoted reed cap 35 and the lower end of which is mounted in a loose reed bar 36 which is disposed in a notch provided therefor in a conventional lay 31. The lay; 31 and the reed cap 35 are supported in a conventional manner on swords 40., only one of which is .shown. in Figures 1, 2 and 3. The lower ends of the swords 40 are pivotally supported for; rockingv movement on a conventional rocker shaft 4|.

Oscillation is transmitted to the lay 31s,, reed 34, and reed ca 35 from a. conventional crank shaft 42 which is driven in. a conventionalmanner and which is provided with crank throws 43 to which the rear ends of conventional pitman rods or arms 44 are pivotally connected. The front ends, of the pitman arms 44 are pivotally connected: to. the corresponding swords 40. It is thus seen that oscillation is imparted to the swords 40, the lay 31, the reed 34 and the reed capv 35 upon each revolution of the crank shaft 42. The base warp yarns W-I extend forwardly from the reed, as shown in Figure 1, and converge at a beat-up point indicated at B at which point the weft yarns are beat-up with the warp yarns to form terry fabric indicated at F which then extends to a suitable take-up means in.- cluding a sand roll 41.

The loop warp beam 26 has loop warp yarns W-2 extending downwardly therefrom in Figure 1 which are preferably of substantially greater diameter than the base warp yarns W-l and are also of a relatively lighter twist. These loop warp yarns W-2 extending beneath and partly around an improved loop warp feed control roll 50 opposed ends of which are rotatably mounted in bearing blocks only one of which is shown on the corresponding loom side frame 20 (Figures 5 and 6). The manner in which this roll 50 controls the slackening or feeding of the loop warpyarns W-=2 will be later described.

In order to insure traction of the loop warp yarns W-2 against the periphery of the roll 50, this r011 50 is preferably provided with an abraded surface and also is engaged by an idler roll 52 over which the loop warp yarns W-2 also pass subsequent their passing beneath the roll 50. The loop warp yarns W'-2 then extend downwardly past guide rods or rolls 53 and 54, successively, from whence they extend forwardly and are interspersed between some of the base warp .yarns W-l as the loop warp yarns pass forwardly, they pass through a plurality of heddles 55 .to the lower end of each of which a corresponding weight or lingo 56 is connected as is clearly shown in Figure 2. These heddles 55 depend from cords which extend through a, comber board 5'! and thence to a suitable pattern mechanism such as a jacquard, not shown, but which may be of a double lift type such as is shown in United States Patent No. 802,-938,-.

It is evident that the loop warp yarns W-Z' extend forwardly from the heddles 55 and pass through the reed 34 to be beat-up-into the fabric F. Of course, the conventional take-up means embodied in the sand roll 41 serves-as a normal take-up means for said loop warp yarns W -2 as they are interwoven to form the fabric The parts heretofore described are conventional parts of the usual type of loom for weaving terry fabrics'and it is with these parts that the present invention is adapted to be associated.

Since the primary object of this invention is to provide coacting attern controlled meansifor varying the effective beat-up stroke of thereed 34 and to momentarily excessively feed the loop warp yarns to the reed 34, 'a description willfirst be given of the means for' 'aryingthe effective beat-up stroke of the reed 34.

Referring to Figures 1, 2 and 3, it will be observed that the swords 40 each has 'a bearing block 60 suitably secured thereto, only one of which is shown in the drawings. These bearing blocks oscillatably support a pivot shaft 5| to which the rear ends of a plurality of laterally spaced first crank arms 62' are fixedly -secured, only one of these armsbeingshown the drawings. These arms 62 extend forwardly andupwardly at a slight angle relative to the horizontal.

Also, fixed on the'pivot shaft. 6! is the upper end of a second crank arm 54. which-extendsat substantially right angles to the crank armsi62 and :is provided with an adjustment slot 65, to which the front end of a. traverse'bartfi; is ad,- justablyand pivotally connected. The traverse bar normally has forward andrearward movement in a substantially horizontally disposed tubular guide member ill pivotally connected at, its rear end, as at ll (Figures 1 and 3), to a, block 12 suitably secured to the .rear lower g irt-23.

The upper wall of the tubular guide member 10 is notched as at 13 so the free end of a pivoted latch or pawl 15 may, at times, enter the notch I3 to bear against the upper surface of the traverse bar 56. This latch T5is'pivotallym'om1ted intermediate its ends, as at T6, on a suitable support 11 projecting upwardly from opposed sides of the tubular member TB.

According to the desired'patte'rn, the latch '15 is urged into engagement with the upper surface of the traverse bar 65 during a forward'stroke of the swords '49. The traverse bar "66 has a notch 8'6 in the upper edge thereof which is then engaged by the latch T5't0 thus prevent'further forward movement of the traversebartfi. This will cause the crank arms 62-and "64 to rotate the shaft lil a partial revolution.- for changing the position of the reed 34 relative to the lay 1 31in a manner to be later described.

The latch 15 has a connecting rod or wire 82 connected tothe rear end thereof which is bent so as to miss the cam shaft 3| and the upper end of which is resiliently connected, as by a tension spring 83, to the lower end of a cord 84' which is the usual part of a jacquard pattern mechanism. The purpose of the resilient connection 83 between the connecting rod or wire 82 and the cord 84 is to permit the cord 84 to continue its upper movement after the working end of the latch 15 has engaged the traverse bar 66 and to thus insure that the latch 15 will subsequently be urged into the notch 86 in the traverse bar 66.

The lower end of a longitudinally adjustable link 86 is pivotally connected, as at 81, to the front free end of each of the first crankarms 62. A tension spring 96 is connected at its lower end intermediate the ends of each link 86, its upper end being suitably connected to the lay 31. This tension spring 96 normally urges the link 86 upwardly thus normally urging the crank arms 62 and 64 and the pivot shaft 6Iin a clockwise direction to assume substantially the position shown in Figure 1 relative tothe swords 46. It is evident that upon the latch 15 engaging the notch 86 of the traverse bar 66, the tension in the spring 96 will be overcome to permit the crank arms 62 and 64 to rotate in a counter-clockwise direction in Figure 1.

The upper end of each link 86, only one of which is shown in Figures 1, 2, 3 and 4, is pivotally connected to a projection 93 depending from one end of a corresponding toggle link 94. Each toggle link 94 is connected at its front end to a toggle support 9| and its rear end is connected to the front end of a second toggle link 95 which straddles the same. The rear end of each toggle link 95 is pivotally connected to the lower end of a corresponding lever 96 which it also straddles.

Each lever 96 is oscillatably mounted intermediate its ends, as at I66, on the outer end of a block I6I suitably secured to the lay 31. The upper end of each lever 96 is pivotally connected as at I62, tothe rear edge of the loose reed bar 36. It is preferable that a group of each of the parts 62, 86, 81, 96, BI, 93 to 96, I66, IOI and I62 is provided adjacent each of the side frame members 26 and at the middle of the lay 31 in order to adequately control the position of the loose reed bar 36 throughout its length. i

A conventional protector rod 38 is rotatably mounted in bearing blocks 39 beneath the lay 31, against which the junction of the toggle links '94 and 95 is normally urged by the tension spring 96. Referring to Figure 4, it will be noted that the junction of the toggle links 94 and 95 is against the protector rod 38 and is off-center in order to lock the toggle links 94 and 95 in position until downward pressure is applied to the link 86, whereupon the toggle links 94 and 95 move to the position shown in Figure 3.

Now, as heretofore stated, when the loose reed bar 36 is disposed in substantially the position shown in Figure 1 relative to the lay 31, a normal beat-up stroke will be transmitted to the reed 34 from the lay 31 and the reed cap 35 upon each beat-up stroke thereof. However, when the pattern means from which the cord 84 extends moves the latch 15 into operative position for engaging the notch 86 on the traverse bar 66, the crank arms 62 and 64 move in a counterclockwise direction relative to the swords 46 and will cause each connecting link 86 to move downwardly.- This will result in the corresponding toggle links 94 and 95 moving downwardly at their proximatev ends to thus move each lever 96 in a clockwise direction in Figures 1 and 4.

This will result in the loose reed bar 36 swinging partially out of the notch provided therefor in the lay 31 and thus, the reed 34 will stop short of a normal beat-up stroke thereof (see Figure 3) while the lay 31 continues to the forward limit of its normal beat-up stroke.

It is thus seen that I have provided an im-. proved pattern controlled means for varying the position of the reed 34 relative to the lay 31 upon predetermined beat-up strokes thereof. Operating in conjunction with the pattern controlled means for varying the position of the reed 34 relative to the lay 31, is a pattern controlled means for imparting rotation to the loop warp feed control roll 56 at a speed faster than the normal speed imparted thereto by the take-up means embodied in the sand roll 41.

Referring to Figures 5 and 6, it will be observed that there is a pinion I65 fixed on one end of the roll 56 and which meshes with a gear I66 having a ratchet wheel I61 integral. therewith. The ratchet wheel I61 and the gear I66 are rotatably mounted on a stub shaft I I6, one end of which is fixedly secured in the bearing block 5I. The bearing block 5I is suitably secured to a vertically disposed frame member III which extends downwardly and is secured to the left-handside frame member 26.

Also, oscillatably mounted on the stub shaft II6 is a bell crank II2 having an upwardly extending arm H3 integral therewith on which a ratchet pawl H4 is pivotally mounted intermediate the ends thereof. The outer end of this ratchet pawl II4 has one end of a flexible cord II5 connected thereto. The pawl H4 is normally urged in a counterclockwise direction in Figure 6 by a tension spring H6. However, the rear end of the pawl II4 may be made heavy enough to over-balance its front end, instead of using the spring II6, to normally urge the front end of the pawl I I4 upwardly to inoperative position, if desired. This cord II5 extends inwardly in substantially parallel relation to the horizontal portion of the arch 24, after passing upwardly through a suitable eye II1 extending from the arm H3 of the bell crank I I2, and also extends towards the observer in Figure 1 and is then passed beneath a rod I26 extending rearwardly from the horizontal portion of the arch 24. The cord H5 is then resiliently connected,- as by a tension spring l2l, to the lower end of a cord 84a which is also a part of the Jacquard mechanism.

Now, upon each beat-up stroke of the lay 31, the bell crank H2 is caused to oscillate so as to move the ratchet pawl I I4 past or in engagement with the ratchet wheel I61. According to the patterning of the pattern mechanism, not shown, the cord 84a will move upwardly subsequent to certain relatively short beat-up strokes of the reed 34 thus causing the ratchet pawl II4 to move into engagement with the ratchet wheel I61 and, upon each reciprocation of the bell crank H2, 2. step in rotation will be imparted to the feed roll 56 at a faster rate than the loop warp yarns W-2 are normally pulled thereby through normal operation of the conventional take-up means embodied in the sand roll 41. This will result in the loop warp yarns. W-2 being slackened during the initial normal beat-up 7, stroke; or strokes. following each relatively short beat-11p stroke orseries of: relatively short beatup strokes of the reed and, thus, these slackened loop warp yarns will be piled up by the several picks of weft yarn being carried forward together to the fell of the cloth or fabric F by said initial normal beat-up strokes of the reed, resulting in loops being formed of the lengths of loop warp yarns fed at a faster than normalrate by the feedroll i].

Oscillation is imparted'to the bell crank I I2 by means of a cam I26 (Figures 1 and 5) fixed on the cam shaft 3| which engages :a forwardly and rearwardly extending arm l2I pivoted at one end on thecorresponding loom side framemember and the rear end of which is pivotally connected to the lower end of a longitudinally adjustable connecting rod or link I22. Iihe connecting :rod I22 extends upwardly and is pivotally connected, as at I23, to the free end of an arm I24 of the bell crank H2, this arm I24 extending at substantially right angles to the arm, H3 heretofore described.

It will be observed, in Figure 6, that a holdback pawl I25 rests against the teeth of ratchet wheel I01 and is pivoted on the frame member III 50 as to prevent unintentional reverse movement of the feed roll 56. However, it is evident that this hold-back pawl .I25 may be raised out of engagement with the teeth of the ratchet,

wheel I ll! for the purpose .of backing up the loop warp yarns W2 in the event of an imperfect fabric having been woven and necessitating that some of the weft yarns be ,picked out of the fabric torbe vrewoven therein.

It is thus seen that Ihaveprovided pattern. controlled means for controlling the feeding of an excess length of the loop warp yarns at predetermined intervals to operate in coacting relationship to the means for varying the beat-up stroke of the reed 34. Although many attempts have been made to perfect an apparatus for varying the length of the beat-up stroke of the lay or reed 34 the present apparatus is of a relatively simple construction and may be easily and economically manufactured and also includes a minimum of parts which may be easily applied to looms with only slight modifications of the looms being required.

In the drawings and specifications there has been set forth a preferredembodiment of :the invention and although specific terms are employed, they are used. in a generic and descriptive sense onlyand not for purposes of limitation, the scope of theinvention being defined in the claims:

I claim:

1. In combination with a loom for weaving looped fabrics and having means for taking up the fabric woven .in the loom, said loom having an oscillatable lay and also having. a reed cappivotally supported in spaced relation to the lay and also having a reed supported by the reed cap for pivotal movement therewith, said loom having oscillatable swords thereon forisupporting the lay and the .reed cap and .means for directing loop warp yarnsto said reed; pattern controlled means, for swinging the reed to occupy different positions relative to the lay upon certain beat-up strokes thereof comprisinga lever pivoted on the lay andbeing pivotally connected at one end thereof to the reed, a toggle leverage means pivotally connected to the other end of the lever, a traverse bar, a tubular member pivotally supported by the loom and in which the traverse bar is adapted toihayelongitudmalmovement, said traverse bar termediate the ends of the swords, at least one first crank arm fixedly mounted on .said pivot shaft, the free end of the first crank arm having a mechanical connection with said toggle lever! age means, a second crank arm fixed on the pivot shaft and to which one end of the traverse bar is pivotallyconnected and spring means normally holdingnthe second crank arm in such a manner as to cause a normal beat-up stroke to be imparted to the reed upon each beat-up stroke of the laywhereby, upon said latch means engaging the notch-in the traverse bar, the traverse bar will cause the second crank arm to which it is :connected to rotate the pivot shaft during forward movement of the swords to, in turn, impart movement to the first crank arm and the toggle leverage means andthus to the lever for swinging thereed rearwardly relative to the lay upon a beat-up stroke thereof to cause the reed to beat-up the weft yarn in spacedrelation to a previously beatup weft yarn.

2. An improvement in a loom for weaving looped fabrics, said loom having means for taking up the fabric woven in the loom, said loom having an oscillatable lay and also having a reed cap pivotally supported in spaced relation to the lay and also having a reed supported by the reed cap and said loom also having oscillatable swords thereon for supporting the lay and :means for directing loop warp yarns to said reed; said improvement comprising pattern controlled means for swinging the reed to occupy different positions relative to the lay upon certain beat-up strokes thereof including a first lever pivoted on the lay and being pivotally connected at one end thereof to the reed, at least one pair of toggle levers pivotally connected to each other at their proximate ends, the free end of one'of the toggle levers being pivotally connected to the lay and the free end of the other toggle lever being pivotally connected to the first lever, a traverse bar, a guide member pivotally supported by the m and in which the traverse bar is adapted to have longitudinal movement, said traverse bar having a notch therein, pattern controlled latch means carried by the guide member for engaging the notch in the traverse bar at predetermined inter: vals, at least one first crank arm pivotally supported at one end intermediate the ends of the swords, the, other end of the first crank arm having one end of a'link pivotally connected thereto; the other end of said link being pivotally connected to at least one of said toggle levers, a second crank. arm pivoted on the swords inwfixed relation to saidfirst crank arm. and to which one end of the traverse bar is pivotally connected, and resilient means normally holding the crank arms in such a manner as to cause a normal beat-up stroke to be imparted to the reed upon each beat-up stroke of the lay whereby, upon said latch means engaging the notch in the traverse bar, the traverse bar will cause the crank arms to rotate during forward movement of the swords to, in turn, impart movement to the proximate ends of the toggle levers and, thus, to the lever so as to swing the reed rearwardly relative to the lay upon a beat-up stroke thereof to thus cause the reed to beat-up the weft yarn in spaced. relation to a previous normally beat-up weft yarn.

3. An improvement in a loom for weaving looped fabrics, said loom having means for taking up the fabric woven in the loom, said loom having an oscillatable lay and also having a reed cap pivotally supported in spaced relation to the lay and also having a reed supported by the reed cap and said loom also having oscillatable swords thereon for supporting the lay and means for directing loop warp yarns to said reed, said improvement comprising pattern controlled means for swinging the reed to occupy different positions relative to the lay upon certain beat-up strokes thereof including a first lever pivoted on the lay and being pivotally connected at one end thereof to the reed, a pair of toggle levers pivotally connected to each other at their proximate ends, the free end of one of the toggle levers being pivotally connected to the lay and the free end of the other toggle lever being pivotally connected to the first lever, a traverse bar, guide means carried by the loom for guiding the traverse bar for longitudinal movement, said traverse bar having a notch therein, pattern controlled latch means for engaging the notch in the traverse bar at predetermined intervals, a support carried by the loom in fixed relation to the guide means, said latch means being movably supported by said support, at least one first crank arm pivotally supported at one end intermediate the ends of the swords, the other end of the first crank arm having one end of a link pivotally connected thereto, the other end of said link being pivotally connected to at least one of said toggle levers, a

second crank arm pivoted on the swords in fixed relation to said first crank arm and to which one end of the traverse bar is pivotally connected, and resilient means normally, holding the crank arms in such a manner as to cause a normal beat-up stroke to be imparted to the reed upon each beat-up stroke of the lay whereby, upon said latch means engaging the notch in the traverse bar, the traverse bar will cause the crank arms to rotate during forward movement of the swords, to in turn, impart movement to the proximate ends of the toggle levers and, thus, to the lever so as to swing the reed rearwardly relative to the lay upon a beat-up stroke thereof to thus cause the reed to beat-up the weft yarn in spaced relation to a previous normally beat-up weft yarn.

THEODORE C. SIPPEL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,249,899 Carpenter Dec. 11, 1917 1,322,730 Rhoades NOV. 25, 1919 1,539,178 Giardino May 26, 1925 1,657,429 Brown Jan. 24, 1928 2,250,833 Hill July 29, 194-1 

